Wrench.



H. C. SHAMBUN.

WRENCH.

APPLICATION FlLED APR-5,1916.

.,QQU, Patented Oct. 3l, 1916.

HARVEY C. SHAMIBLIN, OF COMMERCE, OKLAHOMA.

WRENCH.

Specification of Letters Patent,

ratentea oet. ai, iaic.

Application filed April 6, 1916. Serial No. 89,315.

To all whom t may concer/lt.'

Be it known that 1, HARVEY C. SHAMBLIN, a citizen of the United States, residing at Commerce, in the county of Ottawa and State of Oklahoma, have invented certain new and useful Improvements in l/Vrenches; and 1 do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to wrenches and particularly to wrenches for pipes; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed.

In the drawings, Figure 1 is a side view of a Wrench constructed according to this invention. Fig. 2 is a longitudinal section through the wrench, taken on the line -m in Fig. 1. Fig. 3 is a section taken on the line g/-g/ in Fig. 2, and drawn to a larger scale.

The wrench is provided with a handle 2 having a longitudinal socket 3 at its upper end portion. A non-slidable wrench jaw 30 is provided, and has a shank 4L which is pivoted by a pin 5 in one side of the upper end portion of the socket 3. A slidable wrench jaw 6 is provided and has a long shank 7 which is'slidable longitudinally in the other side portion of the socket.

A longitudinal groove 8 is formed in one side of the slidable shank 7 and 9 is a screw which engages with the side wall of the socket and projects into the groove 8. The lower end l0 of the groove forms a stop which prevents the shank from sliding out of the socket altogether, by coming in contact with the end portion of the screw. The. other side of the shank 7 is provided with a rack 12 having ratchet-shaped teeth which are sunk below its surface. The socket 3 has a chamber 14 formed on one side of its upper end portion over the rack 12. A short shaft or pin 15 is journaled in bearings in the sides of the chamber 14;, and a head or knob 16 is provided on one end of the shaft 15. The other end portion of the shaft has a screwthreaded portion 17 and a nut 18, and the head 16 has a notch 19 to enable the shaft to be held from revolving while the nut 18 is being screwed up tightly. A pawl 20 is secured on the shaft 15 inside the chamber, and a helical spring 21 is arranged between the pawl and one end of the chamber, so as to normally hold the pawl in engagement with the toothed rack and prevent the slidable shank from moving outwardly.

The shaft 15 has a lateral projection 22 on one side, and a slot is formed in the pawl. The projection fits in the slot of the pawl like a key so lthat the pawl never slips circumferentially on the shaft. The hole in the side of the chamber neXt to the knob is elongated to permit the part 22 to pass through it, and the spring holds the shaft against one side of this hole.

rl"he wrench jaws are moved toward each other by simply pushing in the slidable jaw and its shank. l/Vhen the jaws are to be separated the knobl 16 is turned by hand so as to release the slidable shank from the pawl.

This wrench is simple to construct and is very rapid in adjustment. The knob 16 is arranged in the angle formed between one side of the chamber and the socket, where it is protected from injury so that it cannot get broken off. The chamber 14 is formed integral with the socket and handle; and the projection 22 is formed integral with the pawl shaft, so that there are no loose parts which are liable to be broken off or displaced.

hat 1 claim is:

1. In a wrench, a handle provided with a socket having a laterally projecting chamber on one side of it, a non-slidable jaw, a slidable jaw provided with a shank which is slidable in the said socket and which has a toothed rack on one side, a shaft journaled in the sides of the said chamber and provided with an operating knob arranged in the angle between the chamber and socket, and a spring-pressed pawl secured on the said shaft inside the chamber 'and normally engaging with the toothed rack.

1n a wrench, a handle provided with a socket having a laterally projecting chamber on one side of it, a non-slidable jaw, a slidable jaw provided with a shank which is pressed pavvl mounted on the said shaft and slidable in the said socket and which has its projection and normally engaging with a toothed rack on one side, a shaft j ournaled the toothed rack.

in the.sides of the said chamber and pro- In testimoni7 whereof I have aixed my vided With a lateral projection at its middle signature.

part inside the chamber and having an operating knob on one end, and a spring- HARVEY C. SHAMBLIN.

Copies of this patent may be obtained for v cents each, by addressing. the Commissioner of Patents,

Washington, D. C. 

